cal materials, by the combination of which fire is to be obtained, at b, which part is shown in section; and a train or quick match c, is represented by dots, extending from the igniting matter to the combustible matter.

The two sorts of chemicals for producing the ignition are to be placed in the recess at b, intercepted by a plate of tin passed between them. The composition of these matters are not claimed as new; but those which are recommended to be employed in these signals, are a mixture of two parts of oxymuriate of potash, and one part of sulphuret of antimony, with which the fibres of cotton are to be impregnated; and contiguous to this, a small glass globule is to be placed, containing sulphuric acid.. When this glass globule has been broken, by a blow or pressure, the sulphuric acid will be allowed to flow into the cotton, and by there acting chemically upon the material with which the cotton is impregnated, will instantly produce ignition.

The invention is, guarding these chemical materials, by placing them in the recess b, and introducing a small partition of tin or other matter d, between the cotton and the glass globule, by which means the communication between the two chemical matters will be intercepted; and in the event of the glass globule being accidentally broken, which is not likely to happen in that situation, its contents will not be allowed to flow into the other materials; but when the signal light is to be discharged, the slip of tin d, must be withdrawn from the recess. The Patentee proposes that a screw shall be introduced into the recess b, for the purpose of crushing the glass globule, and thereby producing ignition; which, passing by the slow match c, to the combustible materials at a, will cause the signal to take fire.[Inrolled in the Inrolment Office, May, 1837.]

To JOHN FUSSELL, of Nunney, in the county of Somerset, edge-tool maker, for his invention of improvements in pumps.-[Sealed 29th December, 1835.]

THE Patentee states, that it is well known, in working pumps, particularly where the water has to be raised from a considerable depth, that it frequently happens that the water will not follow the bucket so quickly as to give full effect to the power exerted. To remedy this evil, therefore, it is proposed to form a chamber by the side of the pump barrel, opening into the rising main.

Plate V., fig. 15, represents a pump in section, in which a, is the rising main ; b, the barrel; c, the bucket; and d, the auxilliary chamber, opening at the bottom into the rising main below the foot valve.

The Patentee goes on to say, that it will be found, by applying this improvement to pumps, that the following effects will take place :-on first working the pump, before any water rises in the main, the action of the piston or bucket will be to effect an exhaustion of the air from the rising main, and also from the chamber d; the water will then flow up and fill the rising main, and the pump barrel; partially filling the chamber d, at the same time. The consequence of this will be, that in the future working of the piston, immediately on its rising from the foot valve, the water in the chamber d, will more readily pass into the pump barrel than the whole mass of the water in the suction pipe (the rising main); but that in the descent of the piston, the water will flow from the main, and again occupy the chamber d, ready for the next up-stroke of the piston.

This constitutes the first

head of the invention claimed under this patent.

The second feature of improvement, is forming an airchamber above the bucket, by constructing it with a

VOL. IX.

P

hollow stem a, as shown in fig. 16. The object and effect of an air-chamber above the bucket, for equalising the flow of the water, has been so long, and so well known, that we need say no more upon the subject. The Patentee has left us to discover, by conjecture, what he intends to claim as new under this patent.[Inrolled in the Inrolment Office, June, 1836.]

SCIENTIFIC NOTICE.

ACT OF CONGRESS OF THE UNITED STATES OF AMERICA, RESPECTING THE LATE CALAMITOUS CONFLAGRATION OF THE

PATENT OFFICE, WASHINGTON, ON THE 15TH DECEMBER, 1836.

Continued from vol. x. p. 313.

Section 4. And be it further enacted, that it shall be the duty of the Commissioner to procure duplicates of such models so destroyed, as were most valuable and interesting, and whose preservation would be important to the public, and such as would be necessary to facilitate the just discharge of the duties imposed by law, or the Commissioner in issuing patents, and to protect the rights of the public and of patentees in patented inventions, provided that á duplicate of such models may be obtained at a reasonable expense. And provided also, that the whole amount of expenditure for this purpose shall not exceed the sum of one hundred thousand dollars. And there shall be a temporary board of Commissioners, composed of the Commissioner of the Patent Office, and other persons, to be appointed by the President, whose duty it shall be to determine upon the best and most judicious mode of obtaining models of suitable construction, and to determine what models may be so procured. And these Commissioners may make such regulations, terms, and conditions, not inconsistent with law, as may be necessary to carry the provisions of this section into effect.

Section 5. And be it further enacted, that whenever a patent

shall be returned for correction, and re issue under the 13th section of the late Act; and whenever the patentee shall desire several patents to be issued for distinct and separate parts of the thing patented, he shall first pay, in addition to the sum provided by that act, the sum of thirty dollars for each additional patent so to be issued. Provided, however, that no patent made prior to the aforesaid fifteenth day of December, shall be corrected and re-issued until a duplicate of the model and drawing of the thing as origi nally invented, verified by oath, as shall be required by the Commissioners, shall be deposited in the Patent Office; nor shall any addition of an improvement be made to any patent heretofore granted, nor any new patent to be issued for an improvement made in any machine, manufacture, or process, to the original in ventor, assignee, or possessor of a patent therefore, nor any disclaimer be admitted to record, until a duplicate model and drawing of the thing originally invented, verified as aforesaid, shall have been deposited in the Patent Office, if the Commissioner shall require the same; nor shall any patent be granted, for an invention, improvement, or discovery, the model or drawing of which shall have been lost, until another model and drawing, if required, shall be deposited in the Patent Office. And in all such cases, as well as in those which may arise under the third section of this act, the question of compensation for such models and drawing shall be subject to the judgment and decision of the Commissioners provided for in the fourth section, under the same limitations and restrictions as are therein prescribed.

Section 6. That any patent hereafter to be issued, may be made and issued to the assignee or assignees of the inventor or discoverer, the assignment thereof being entered of record, and the application, therefore, being duly made, and the specification duly sworn to by the inventor. And in all cases, hereafter, the applicant for a patent shall furnish duplicate drawings, whenever the case admits of drawings, one of which to be deposited in the office, and the other to be annexed to the patent, and considered a part of the specification.

Section 7. That, whenever any Patentee shall have, through in

advertence, accident, or mistake, made his specification of claim too broad, claiming more than that of which he was the original or first inventor, some material and substantial part of the thing patented being truly and justly his own, any such Patentee, his administrators, executors, and assigns, whether of the whole or of a sectional interest therein, may disclaim such parts of the thing patented, as the disclaimant shall not claim to hold by virtue of the patent or assignment, stating therein the extent of his interest in such patent, which disclaimer shall be in writing, attested by one or more witnesses, and recorded in the Patent Office, on payment, by the person disclaiming, of the sum often dollars. And such disclaimer shall thereafter be taken and considered as part of the original specification, to the extent of the interest which shall be possessed in the patent by the disclaimant, and by those claiming by or under him subsequent to the record thereof. But no such disclaimer shall affect any action pending at the time of its being filed, except so far as may relate to the question of unreasonable neglect or delay in filing the same.

Section 8. That, whenever application shall be made to the Commissioner for any addition of a newly-discovered improvement to be made to an existing patent, or whenever a patent shall be returned for correction and re-issue, the specification of claim annexed to every such patent shall be subject to revision in the same manner as are original applications for patents; the Commissioner shall not add any such improvement to the patent in the one case, nor grant the re-issue in the other case, until the applicant shall have entered a disclaimer, or altered his specification of claim in accordance with the decision of the Commissioner; and in all such cases, the applicant, if dissatisfied with such decision, shall have the same remedy, and be entitled to the benefit of the same privileges and proceedings, as are provided by law in the case of original application for patents.

Section 9. That, whenever, by mistake, accident, or inadvertence, and without any wilful default or intent to defraud or mislead the public, any Patentee shall have in his specification, claimed to be the original and first inventor or discoverer of any material or